The Breeders’ Cup is just one weekend at the end of the season, but Breeders’ Cup excitement builds throughout the year with the Breeders’ Cup Challenge Series. The yearlong “Win and You’re In” series awards a guaranteed place in the starting gate, plus entry fees and a travel stipend, to a few talented horses who win a qualifying race leading up to the Breeders’ Cup World Championships held at Santa Anita Park on Nov.